Final answer:
The Sea of Galilee, also known as Lake Kinneret or the Sea of Tiberias, acts as a major freshwater supply for Israel. Desalinization plants have also been implemented to meet the growing population's needs.
Step-by-step explanation:
The body of water that provides fresh water to Israel is the Sea of Galilee, also known as Lake Kinneret or the Sea of Tiberias. The Sea of Galilee is a major freshwater supply, and the Jordan River flows from it to the Dead Sea.
Additionally, Israel has implemented desalinization plants to accommodate its increasing population and fresh water requirements.